National Marker N115055 Spring Door Hinge 3 Inches 2 Pack

Product Description

The NATIONAL MARKER N115055 is a full-surface, zinc-plated spring door hinge designed for interior door applications where automatic closing is required. Built from cold-rolled steel with a solid brass adjustable collar, this 3-inch hinge features a fully enclosed spring mechanism that provides consistent, controlled closing action. The stud pin allows the installer to adjust closing speed to the desired rate without removing the hinge. At 1.023 pounds per pack, the unit ships with screws included and requires no mortising for installation.

This hinge is suited for residential and light commercial door installations where a surface-mount spring hinge is needed. It works on both right-hand and left-hand door swings, making it a versatile stocking item for door hardware service calls or new construction. Sold as a 2-pack (1 pair), it covers a single door application. Typical use cases include interior passage doors, utility room doors, and similar applications requiring hands-free automatic closing.

Key Features

• Full-surface mount design eliminates mortising for faster installation
• Adjustable stud pin controls closing speed to suit the application
• Fully enclosed spring mechanism protects the spring from dust and damage
• Compatible with both right-hand and left-hand door swings
• Cold-rolled steel construction with zinc plating for corrosion resistance
• Includes mounting screws — no additional hardware required

Compatibility

The N115055 corresponds to catalog model series V125. Designed as a full-surface replacement or new-installation spring hinge for standard interior residential and light commercial doors requiring no mortise cutout.

Installation Notes

Installation is typically performed by a finish carpenter, door hardware technician, or general contractor using standard hand tools. No mortising or door edge prep is required for full-surface application. Before installing, confirm door alignment and ensure the door frame is structurally sound. Adjust the stud pin incrementally after mounting to dial in the preferred closing speed before finalizing the installation.

Technical Specifications

• Hinge Size: 3 inches
• Material: Cold-rolled steel with zinc plating
• Collar Material: Solid brass, adjustable
• Spring Type: Fully enclosed
• Mount Type: Full surface, no mortising required
• Hand: Right hand or left hand
• Package Contents: 1 pair (2 hinges) with screws
• Package Weight: 1.023 pounds
• UPC: 00038613115057

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N115055